1) The fare (f) of a passenger varies directly as the distance (d) of his destination. a) f=k/d b) f=kd c) f=k+d d) f=k-d 2) The rate (r) at which a person types a certain manuscript varies inversely as the time (t) spent in typing. a) r=k/t b) r=kt c) t=kr d) t=k/r 3) The Area (A) of a triangle varies jointly as its base (b) and its height (h). a) A=k/bh b) A=kb/h c) A=kh/b d) A=kbh 4) What is the constant of variation (k) if a is inversely proportional to b and b = 4 when a = 20 ? a) k = 5 b) k = 1/5 c) k = 80 5) An employee’s salary (s) varies directly as the number of days (d) he has worked. If the employee has worked for 5 days and was paid P10,000. What is the constant of variation? a) k = 50,000 b) k = 15,000 c) k = 2,000 6) An employee’s salary (s) varies directly as the number of days (d) he has worked. If the employee has worked for 5 days and was paid P10,000. What does the constant of variation represent? a) The employee's salary in 5 days b) The employee's average daily salary

Direct, Inverse and Joint Variation

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